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April 20, 2014

April 20, 2014

Posted by **sherry** on Thursday, February 16, 2012 at 9:16am.

- physics -
**drwls**, Thursday, February 16, 2012 at 9:38amIt can bounce to 40% of the original height, or 4 meters in this case.

- physics -
**Elena**, Thursday, February 16, 2012 at 11:09amIf the energy is reduced by 40%, then 60% is left. Therefore, PE = mgH = KE (at hitting the ground). Upward motion

0.6KE=0.6mgH = mgh. Then h=0.6x10=6 m.

- physics -
**drwls**, Thursday, February 16, 2012 at 11:11amYes, I misread the question. 60% of the original height is correct

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